Bayern Munich didn't stopped to buy players but other team such as Leverkusen lost players frequently and the latest is Granit Xhaka who agree return to England and playing with Sunderland and actually i wonder why Leverkusen owner has decide to sell all of their important players and this factor too makes me doubt Leverkusen can compete with Bayern Munich for next season and for Dortmund too that although so far they buy players to strengthen their squad but so far those players status only averange players and about the domination of Bayern Munich i am sure they can easily to defend their title
I think the other clubs are trying to compete with Bayern munich that strong club but they fail to adopt such strong policies which make them really able as a strong opponent of Bayern Munich. Actually Bayern Munich Made themselves this able that they are now in a continuous process of buying. They buy the most wanted and talented players and keep trying to add more strength in their club. But on the other side Bayern leverkusen seems to be trying different policies in which they are selling their players. They sold the players that are skilled talented and even the senior ones. By doing this they seem difficult to defend their club against the strong team. Because Bayern Munich is a dedicated team till they keep buying the new talented players is the reason for their success among all.